Big drain on groundwater
water is unfit for human consumption by woodleywonderworks
License (according to Flickr): Attribution License
License (according to Flickr): Attribution License
Everyone needs fresh water, but sometimes need trumps wise use. Humankind’s thirst is draining many aquifers faster than they can be replenished, with some disastrous effects. A new global map of nations’ varying “groundwater footprints” showed the world’s water supplies being sucked up, much of them used to water crops (SN: 9/8/12, p. 10). By the study’s measure, India, Pakistan and Saudi Arabia are among the thirstiest countries. The possibility of running out of water isn’t the only threat. Pumping groundwater, whether for irrigation or drinking, turns out to contribute more to global sea level rise than scientists had thought (SN Online: 5/21/12). Taking water out of the ground means it eventually runs off into the sea. Many scientists had assumed that the water added from aquifers would be roughly balanced by the amount impounded behind dams, but two studies conclude that that’s not the case.
Big drain on groundwater
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Big drain on groundwater
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Overuse of freshwater supplies poses risks
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